don't crash when concatenating structs with no fields * oct-map.cc (octave_map::cat (int, octave_idx_type, const octave_scalar_map*)): Quick return for N == 1. (octave_map::cat (int, octave_idx_type, const octave_map*)): Quick return for N == 1. Only call permute_to_correct_order if there are fields. Use dim_vector::concat to compute result dimensions if there are no fields. New tests for concatentation of structs with no fields. * pt-mat.cc (tm_const::init (const tree_matrix&)): Initialize all_1x1 to true if tree_matrix argument is not empty.

EXTRA_DIST += quadpack/module.mk

libcruft_la_SOURCES += \
  quadpack/dqagi.f \
  quadpack/dqagie.f \
  quadpack/dqagp.f \
  quadpack/dqagpe.f \
  quadpack/dqelg.f \
  quadpack/dqk15i.f \
  quadpack/dqk21.f \
  quadpack/dqpsrt.f \
  quadpack/qagie.f \
  quadpack/qagi.f \
  quadpack/qagpe.f \
  quadpack/qagp.f \
  quadpack/qelg.f \
  quadpack/qk15i.f \
  quadpack/qk21.f \
  quadpack/qpsrt.f \
  quadpack/xerror.f